多路径 FS 在引导时挂载失败，并带有： "mount: special device /dev/mapper/mpatha does not exist"

Issue

在系统引导中，收到以下信息：

Remounting root filesystem in read-write mode:             [  OK  ]
Mounting local filesystems:  mount: special device /dev/mapper/mpathc does not exist
mount: special device /dev/mapper/mpathd does not exist
mount: special device /dev/mapper/mpathe does not exist
mount: special device /dev/mapper/mpathf does not exist
mount: special device /dev/mapper/mpathg does not exist

• 但在引导完成后，在不进行任何更改的情况下就可以挂载 FS，为什么会出现这种情况？